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二次曲线

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Line pencil ; projective comespondence ; conic

线束;射影对应;二次曲线

In this paper, we discuss question to find solution for a function different equation,several quadratic curves geometry properties are obtained.

本文通过对一个泛函微分方程解的讨论,给出一类二次曲线的几何性质。

But for girls, quadratic regression equation could explain more variance of self-evaluation.

不过在女生方面,用二次曲线可以解释较多自我评价的变异。

Firstly, the mapping of high level programming language to hardware description language is described, some principles of the conversion of algorithm to state machine are also proposed; Secondly, the basic raster graphics algorithms for drawing 2D primitives are introduced, including self-adaptive algorithm of singl...

首先讨论了高级语言描述到硬件描述语言的映射,提出了算法到算法状态机抽象的规律;然后,介绍了现有的基本图形生成算法,包括直线的自适应算法、三角形边相关扫描算法,宽直线线刷子算法及改进的圆形、椭圆的生成算法,同时讨论了加速算法的研究现状;接下来具体讨论了基本图形的硬件实现,给出了各算法的状态机流程图、接口定义和实现框架,并且从理论角度给出了二次曲线加速算法的证明;最后采用EDA工具对VHDL程序进行仿真、综合并实现。

Firstly, the curvature continuity conditions between two adjacent rational quadratic curve segments are derived. Secondly, an optimal algorithm is presented for solving out the tangent lines at every points of a closed point set in a plane.

首先导出了两相邻二次曲线段间曲率连续的拼接条件,然后提出了求解平面上一个闭的点列中每一点处的切线的最优算法。

Coefficient function I1 ,I2 ,I3 of quadratic carve is the invariant under the right - angled coordinate transform.

二次曲线的系数的函数I1,I2,I3是直角坐标变换下的不变量,而系数函数k只是转轴变换下的不变量。

The plots of ln K′ of peptide 1 versus φ are well fitted with quadratic equations when isocratically eluted by aquo _ acetonitrile mobile phases.

当以乙腈为流动相测定肽1的lnK′随φ变化关系时,所得结果显示lnK′与φ呈现良好的二次曲线关系。

A coordinate was established with the horizontal, vertical and optical axis defined as the X, Y and Z axis. A circumrotation was then made.

通过建立三维座标系、座标轴旋转、解方程组,求得各个子午线上的二次曲线表达式及Q值。

A programm is designed to calculate nodes of quadric curve by straigh approaching with equalstep length and dimidiate method,thus N/C machining operation program can form automatically.

在一定误差范围内,采用等步长直线逼近法和二分法对二次曲线进行数学计算处理,利用 VisuaL Basic 6。

The result showed that (1)the feed intake and black fat thickness were increased quadratically with increased lactation phase.

研究发现:(1)采食量与背膘厚度在哺乳期内都呈二次曲线变化,即Y=-2.3056x2+24.239x-20.417与Y =-

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。